Figure 1. (a) MRI plain scan: no obvious abnormality was observed. (b) Mass injection of Gd-DTPA enhanced scan: small patchy abnormal enhancement lesion can be seen in the sagittal parietal occipital lobe, with irregular shape and unclear boundary; multiple linear and nodular abnormal lesion with enhancement can be seen in the intracranial perichondrium (arrow); right thalamus neoplastic lesions and extensive meningeal metastasis are possible.